A ball of mass 0.1kg approaching a tennis player with a velocity of 10ms(^{-1}),is hit back in the opposite direction with a velocity of 15ms(^{-1}). If the time of impact between the racket and the ball is 0.01s, calculate the magnitude of the force with which the ball is hit
-
A.
5000N -
B.
500N -
C.
250N -
D.
50N -
E.
25N
Correct Answer: Option C
Explanation
M =0.1kg; F=(mleft(frac{v-u}{t}right) = 0.1left(frac{15-(-10)}{0.01}right)) F=250N